Elastic fluid turbine



March 1, 1932. J. H DORAN 1,847,931

ELASTIC FLUID TURBINE Filed Feb. 28, 1950 Inventor: John 1-1.0 bvfaxw,

B WMW Hi 5 A1211 or'n e g].

Patented Mar. 1, 1932 maven JOHN H. DORAN, or SCHENEGTADY, NEW yonagassieivon To GENERAL ELECTRIC 001v:-

PANY, A conronarron or NEWYYOBK I ELASTIC rnurn'runnmn f The presentinvention relates to elastic fluid such units in which the blades assumecon siderable longitudinal dimensions. This vibration of the turbineblades is a serious factor in the operation of elastic fluid turbines,and unless some means is utilized to minimize this vibration it mayresult in substantial damage to the machine.

' The object'of my invention is to provide an improved construction andarrangement for tying together the blades of an elastic fiuidturbine, 1. e., an improved tie wire construction, and for aconsideration of what I believe to be novel and my invention, attentionis directed to the following specification and the claims appendedthereto.

In the drawing, Fig. 1 is an elevation of a portion of a turbine wheelprovided with a tie wire embodying my invention; Fig. 2 is i a sectionalview of a turblne blade showlng 1n detail the means of attaching the tiewire to the blade, and Figs. 3 and 4 are perspective views in modifiedform of my attaching means.

Referring to the drawings, a fragmentary view of a turbine wheel isshown in Fig. 1, in which the turbine blades 10 are mounted on the wheelrim 11 and are provided with a shroud ring 12. Intermediate the roots ofthe blade 10 and the shroud ring 12 is provided a tie wire 13 which'isdisposed along the edges of the blades and is fastened thereto by meansof clips 14. Theseclips may be fixed with respect to the tie wire andthe blades in any desired manner, but I prefer to secure them by fusedmetal, the attachment being made by soldering, welding, brazing, or thelike. Referring particularly to Fig. 2, the clips 14 comprise a piece ofmetal bent reversely on itself into U-form, the free ends of the clipstraddling the edge of the blade and being suitably soldered, brazed orwelded thereto clips are provided with openin gs throughwhich theftiewire 13 extendsand to which the clips are attached by "soldering,

brazing r w d na- It will benoted'thatin this construction there (18110mutilation of the turbine blades and-that a rigidfastening is providedand which is very simple both to manufacture and to attach to theturbine blades. In addition,

While I have referred above to the use of a clip as illustrated in Figs.1 and 2 which comupon itself and provided with a hole under the foldedend to receive the tie wire, certain modifications may be made in thisclip mem ber without losing the advantages noted above. In Fig. '3 Ihave illustrated a clip member 15 in which the elongated strip is foldedintermediate its center and one end so that the other end projectsbeyond the first. In this construction the holes for receiving the tiewire are formed in the folded portion of the clip and only a single tabextends for engagement with the turbine blade. InFig. 4 I haveillustrated a still simpler construc tion, consistingof a single tab 16provided with a hole under one end for the reception of the tie wire.

Hence, by the use of that clip or clip member in the claimsappendedhereto I desire it to be understood that I refer to any of theabove modifications as well as to such other modifications as willsuggest themselves to those skilled in the art.

In accordance with the provisions of the 95 patent statutes, I havedescribed the punciple of operation of my invention, together with theapparatus which I now consider to represent the best embodiment thereof;but I desire to have it understood that the apparaprise a fiat elongatedpiece of metal folded tus shown is only illustrative and thattheinvention may be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is:

1. In an elastic fluid turbine, means for tying the turbine bladescomprising a series of aligned U-shaped clips engaging both sides of oneedge of said blades and projecting therebeyond, a series of alignedholes in the projecting U-portions, and a tie wire threaded through saidholes.

2. The combination with a turbine wheel having a row of blades, of metalclips attached to the surfaces of the blades by fused metal andprojecting beyond the blades, the projecting ends of such, clips beingprovided with openings, and a tie wire located in said openings andfastened to the clips by fused metal.

In witness whereof, Ihave hereto set my hand this 27th day of February,1930.

s JOHN H, DORAN.

